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Show full calculation please! The loudness, L, of a sound (measured in decibels, dB) is inversely proportional to the square of the distance, d, from

Show full calculation please!

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The loudness, L, of a sound (measured in decibels, dB) is inversely proportional to the square of the distance, d, from the source of the sound. A person 10 feet from a jetski, it is 75 decibels loud. How loud is the jetski when the person is 47 feet away? dB

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